Add WDAT handling for sbsa-gwdt on arm/virt machine.
WDAT mode is enabled by 'wdat' option: ex: "-device sbsa-gwdt,wdat=on"
When WDAT is enabled:
- Build the WDAT ACPI table instead of the GTDT watchdog entry,
since they are mutually exclusive due to different timer
resolution (WDAT uses 1 kHz vs GTDT's system counter frequency).
- Skip FDT watchdog node creation, as the DT-based Linux driver
would use the system counter frequency which doesn't match the
WDAT-mode 1 kHz clock.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260702145856.1539572-8-imammedo@redhat.com>
285bc90d5b